#include <Wire.h>  
 #include <LiquidCrystal_I2C.h> 
  
 LiquidCrystal_I2C lcd(0x20,16,2);  // set the LCD address to 0x20 for a 16 chars and 2 line display 
  
 void setup() 
 { 
   lcd.init();                      // initialize the lcd  
   
   // Print a message to the LCD. 
   lcd.backlight(); 
   lcd.print("Hello, world!"); 
 } 
  
 void loop() 
 { 
 } 
 

 
 #include <Wire.h> 
 #include <LiquidCrystal_PCF8574.h> 
  
 LiquidCrystal_PCF8574 lcd(0x27);  // set the LCD address to 0x27 for a 16 chars and 2 line display 
  
 int show; 
  
 void setup() 
 { 
   int error; 
  
   Serial.begin(115200); 
   Serial.println("LCD..."); 
  
   while (! Serial); 
  
   Serial.println("Dose: check for LCD"); 
  
   // Seehttp://playground.arduino.cc/Main/I2cScanner 
   Wire.begin(); 
   Wire.beginTransmission(0x27); 
   error = Wire.endTransmission(); 
   Serial.print("Error: "); 
   Serial.print(error); 
  
   if (error == 0) { 
     Serial.println(": LCD found."); 
  
   } else { 
     Serial.println(": LCD not found."); 
   } // if 
  
   lcd.begin(16, 2); // initialize the lcd 
   show = 0; 
 } // setup() 
  
 void loop() 
 { 
   if (show == 0) { 
     lcd.setBacklight(255); 
     lcd.home(); lcd.clear(); 
     lcd.print("Hello LCD"); 
     delay(1000); 
  
     lcd.setBacklight(0); 
     delay(400); 
     lcd.setBacklight(255); 
  
   } else if (show == 1) { 
     lcd.clear(); 
     lcd.print("Cursor On"); 
     lcd.cursor(); 
  
   } else if (show == 2) { 
     lcd.clear(); 
     lcd.print("Cursor Blink"); 
     lcd.blink(); 
  
   } else if (show == 3) { 
     lcd.clear(); 
     lcd.print("Cursor OFF"); 
     lcd.noBlink(); 
     lcd.noCursor(); 
  
   } else if (show == 4) { 
     lcd.clear(); 
     lcd.print("Display Off"); 
     lcd.noDisplay(); 
  
   } else if (show == 5) { 
     lcd.clear(); 
     lcd.print("Display On"); 
     lcd.display(); 
  
   } else if (show == 7) { 
     lcd.clear(); 
     lcd.setCursor(0, 0); 
     lcd.print("*** first line."); 
     lcd.setCursor(0, 1); 
     lcd.print("*** second line."); 
  
   } else if (show == 8) { 
     lcd.scrollDisplayLeft(); 
   } else if (show == 9) { 
     lcd.scrollDisplayLeft(); 
   } else if (show == 10) { 
     lcd.scrollDisplayLeft(); 
   } else if (show == 11) { 
     lcd.scrollDisplayRight(); 
   } // if 
  
   delay(2000); 
   show = (show + 1) % 12; 
 } // loop() 
 

const int LEDdizisi[] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13};

void setup () {     
 
  for(int i=0; i<14 ;i++)    
  { 
    pinMode(LEDdizisi[i], OUTPUT); 
  }

}

void loop() {                                                
  for(int i=0; i<14; i++){
    digitalWrite(LEDdizisi[i],HIGH);      
    delay(50);                           
    digitalWrite(LEDdizisi[i],LOW);        
  }
 
  for(int j=13;j>-1; j--)
  { 
    digitalWrite(LEDdizisi[j],HIGH); 
    delay(50); 
    digitalWrite(LEDdizisi[j], LOW);

  }
}

 
 /*  
 Digital Winding Clock - Arduino Clock for beginners    
 No RTC,  
 Just set it to exact time using the push buttons each time you switch on the clock  
 Made by Techno (s??o? ??ןuu?)  
 Feel free to modify  
 */  
 #include <LiquidCrystal.h>  
 LiquidCrystal  
 lcd(12,11,5,4,3,2);  
 int h=12;  
 int m;  
 int s;  
 int flag;  
 int TIME;  
 const int hs=8;  
 const int ms=9;  
 int state1;  
 int state2;  
 void setup()  
 {  
  lcd.begin(16,2);  
 }  
 void loop()  
 {  
 lcd.setCursor(0,0);  
 s=s+1;  
 lcd.print("SAAT:");  
 lcd.print(h);  
 lcd.print(":");  
 lcd.print(m);  
 lcd.print(":");  
 lcd.print(s);  
 if(flag<12)lcd.print("AM");  
 if(flag==12)lcd.print("PM");  
 if(flag>12)lcd.print("PM");  
 if(flag==24)flag=0;  
 delay(1000);  
 lcd.clear();  
 if(s==60){  
  s=0;  
  m=m+1;  
 }  
 if(m==60)  
 {  
  m=0;  
  h=h+1;  
  flag=flag+1;  
 }  
 if(h==13)  
 {  
  h=1;  
 }  
 lcd.setCursor(0,1);  
 lcd.print("HAYIRLI GUNLER");  
 //-------Time  
 // setting-------//  
 state1=digitalRead(hs);  
 if(state1==1)  
 {  
  h=h+1;  
  flag=flag+1;  
  if(flag<12)lcd.print("AM");  
  if(flag==12)lcd.print("PM");  
  if(flag>12)lcd.print("PM");  
  if(flag==24)flag=0;  
  if(h==13)h=1;  
 }  
 state2=digitalRead(ms);  
 if(state2==1){  
  s=0;  
  m=m+1;  
 }  
 }